The difference in class such as class 1 and class 2 transformers is how hard they are to transform. Class 1 are usually the easiest with the minimum amount of flips and moves and the difficulty rises with each class. read more
Typical class 2 circuits include air conditioning thermostats, garage door openers and sprinkler system controls. A class 2 transformer is used to supply class 2 circuits. Class 2 Transformers. Class 2 transformers have a maximum VA rating of less than 100 and a maximum final output of 75 volts. read more